In regards to your pic - those are toggle switches to 'detach' the elements from the page in order to hold the element in place while you are scroll a different section.
The very top one - when switched ON keeps the top header in place while you are scrolling the rest of the page
The one on the dark blue above Dashboard when switched on keeps the left menu in place while scrolling the rest of the page
You can have both on at the same time or one on, one off.
Just click on the switch , when ON it shows a orange circle.
